Submersible pump



FIG. 1 is a side elevational view of a submersible pump showing my new design, the opposite side being a mirror image;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a submersible pump, as shown and described. 